Biemna variantia, Carcinus maenas. Site: Blockhouse Is, Carlingford Lough
 Biemna variantia, Carcinus maenas. Event number: 19830721/06. Site: Blockhouse Is, Carlingford Lough. 1983-07-21. Photograph © Christine Howson. (7/15) 
 Christine Howson (2026). Photograph of Biemna variantia, Carcinus maenas. Site: Blockhouse Is, Carlingford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2579.jpg. Accessed on 2026-11-04